Main Isolate deadlock on isolate disposal

[marcusdarmstrong]

Hi there!

We've recently discovered that isolated-vm can cause a main-thread deadlock when attempting to dispose of isolates. This appears to occur when a promise from the main isolate is pending and proxied into the to-be-disposed isolate. Given that it looks like you're no longer actively maintaining the project I'd be happy to contribute a fix if I could be pointed in the right direction.

Reproduction script:

const ivm = require('isolated-vm');
setInterval(() => { console.log("Event Loop is running"); }, 100); // Never logged.
const isolate = new ivm.Isolate();
const context = isolate.createContextSync();
context.global.setSync("getProm", () => new Promise(() => {}), { reference: true });
context.eval("getProm.applySync()");
context.release();
console.log(`Context released`);
isolate.dispose();
console.log(`Isolate disposed`); // Never logged

Process sample:

Sampling process 23338 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling node (pid 23338) every 1 millisecond
Process:         node [23338]
Path:            /Users/USER/*/node
Load Address:    0x100c64000
Identifier:      node
Version:         0
Code Type:       X86-64
Platform:        macOS
Parent Process:  zsh [74283]

Date/Time:       2022-05-03 09:16:13.808 -0400
Launch Time:     2022-05-03 09:16:08.636 -0400
OS Version:      macOS 11.6 (20G165)
Report Version:  7
Analysis Tool:   /usr/bin/sample

Physical footprint:         10.2M
Physical footprint (peak):  10.2M
----

Call graph:
    2848 Thread_118355832   DispatchQueue_1: com.apple.main-thread  (serial)
    + 2848 start  (in libdyld.dylib) + 1  [0x7fff204e4f3d]
    +   2848 node::Start(int, char**)  (in node) + 200  [0x100cfe5a8]
    +     2848 node::NodeMainInstance::Run(node::EnvSerializeInfo const*)  (in node) + 121  [0x100d74cd9]
    +       2848 node::NodeMainInstance::Run(int*, node::Environment*)  (in node) + 61  [0x100d7502d]
    +         2848 node::LoadEnvironment(node::Environment*, std::__1::function<v8::MaybeLocal<v8::Value> (node::StartExecutionCallbackInfo const&)>)  (in node) + 109  [0x100c6a4dd]
    +           2848 node::StartExecution(node::Environment*, std::__1::function<v8::MaybeLocal<v8::Value> (node::StartExecutionCallbackInfo const&)>)  (in node) + 800  [0x100cfc260]
    +             2848 node::StartExecution(node::Environment*, char const*)  (in node) + 374  [0x100cfc516]
    +               2848 node::ExecuteBootstrapper(node::Environment*, char const*, std::__1::vector<v8::Local<v8::String>, std::__1::allocator<v8::Local<v8::String> > >*, std::__1::vector<v8::Local<v8::Value>, std::__1::allocator<v8::Local<v8::Value> > >*)  (in node) + 110  [0x100cfb42e]
    +                 2848 v8::Function::Call(v8::Local<v8::Context>, v8::Local<v8::Value>, int, v8::Local<v8::Value>*)  (in node) + 285  [0x100ece0ed]
    +                   2848 v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*)  (in node) + 213  [0x100feeb95]
    +                     2848 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&)  (in node) + 2515  [0x100fef583]
    +                       2848 Builtins_JSEntry  (in node) + 131  [0x10172c4c3]
    +                         2848 Builtins_JSEntryTrampoline  (in node) + 91  [0x10172c73b]
    +                           2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                             2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                               2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                                 2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                                   2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                                     2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                                       2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
    +                                         2848 Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_BuiltinExit  (in node) + 57  [0x10179afb9]
    +                                           2848 v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*)  (in node) + 255  [0x100f19f8f]
    +                                             2848 v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments)  (in node) + 550  [0x100f1a836]
    +                                               2848 v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo)  (in node) + 462  [0x100f1b13e]
    +                                                 2848 void ivm::detail::RunBarrier<ivm::detail::CallbackMaker<v8::Local<v8::Value> (*)(ivm::IsolateHandle&), &(v8::Local<v8::Value> ivm::detail::unbind_member_function<v8::Local<v8::Value> (ivm::IsolateHandle::*)()>::invoke<&(ivm::IsolateHandle::Dispose())>(ivm::IsolateHandle&)), -1, v8::FunctionCallbackInfo<v8::Value> const&>::Callback(v8::FunctionCallbackInfo<v8::Value> const&)::'lambda'()>(&(ivm::IsolateHandle::Dispose()))  (in isolated_vm.node) + 27  [0x10da24c0b]
    +                                                   2848 void ivm::detail::CallbackMaker<v8::Local<v8::Value> (*)(ivm::IsolateHandle&), &(v8::Local<v8::Value> ivm::detail::unbind_member_function<v8::Local<v8::Value> (ivm::IsolateHandle::*)()>::invoke<&(ivm::IsolateHandle::Dispose())>(ivm::IsolateHandle&)), -1, v8::FunctionCallbackInfo<v8::Value> const&>::Spread<0ul>(v8::FunctionCallbackInfo<v8::Value> const&, std::__1::integer_sequence<unsigned long, 0ul>)::'lambda'()::operator()() const  (in isolated_vm.node) + 97  [0x10da24cf1]
    +                                                     2848 ivm::IsolateHandle::Dispose()  (in isolated_vm.node) + 20  [0x10da19e54]
    +                                                       2848 ivm::IsolateHolder::Dispose()  (in isolated_vm.node) + 60  [0x10d9f155c]
    +                                                         2848 ivm::IsolateEnvironment::Terminate()  (in isolated_vm.node) + 113  [0x10d9e7af1]
    +                                                           2848 ivm::Scheduler::CancelAsync()  (in isolated_vm.node) + 36  [0x10d9f4bf4]
    +                                                             2848 std::__1::mutex::lock()  (in libc++.1.dylib) + 9  [0x7fff204603d9]
    +                                                               2848 _pthread_mutex_firstfit_lock_slow  (in libsystem_pthread.dylib) + 204  [0x7fff204c5192]
    +                                                                 2848 _pthread_mutex_firstfit_lock_wait  (in libsystem_pthread.dylib) + 76  [0x7fff204c72ab]
    +                                                                   2848 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff204964ca]
    2848 Thread_118355833
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::WorkerThreadsTaskRunner::DelayedTaskScheduler::Run()  (in node) + 361  [0x100da2529]
    +       2848 uv_run  (in node) + 401  [0x10170f901]
    +         2848 uv__io_poll  (in node) + 947  [0x101722b43]
    +           2848 kevent  (in libsystem_kernel.dylib) + 10  [0x7fff20498c4a]
    2848 Thread_118355834
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::(anonymous namespace)::PlatformWorkerThread(void*)  (in node) + 339  [0x100d9f6f3]
    +       2848 node::TaskQueue<v8::Task>::BlockingPop()  (in node) + 72  [0x100da2738]
    +         2848 uv_cond_wait  (in node) + 9  [0x10171d449]
    +           2848 _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]
    +             2848 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff20496cde]
    2848 Thread_118355835
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::(anonymous namespace)::PlatformWorkerThread(void*)  (in node) + 339  [0x100d9f6f3]
    +       2848 node::TaskQueue<v8::Task>::BlockingPop()  (in node) + 72  [0x100da2738]
    +         2848 uv_cond_wait  (in node) + 9  [0x10171d449]
    +           2848 _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]
    +             2848 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff20496cde]
    2848 Thread_118355836
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::(anonymous namespace)::PlatformWorkerThread(void*)  (in node) + 339  [0x100d9f6f3]
    +       2848 node::TaskQueue<v8::Task>::BlockingPop()  (in node) + 72  [0x100da2738]
    +         2848 uv_cond_wait  (in node) + 9  [0x10171d449]
    +           2848 _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]
    +             2848 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff20496cde]
    2848 Thread_118355837
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::(anonymous namespace)::PlatformWorkerThread(void*)  (in node) + 339  [0x100d9f6f3]
    +       2848 node::TaskQueue<v8::Task>::BlockingPop()  (in node) + 72  [0x100da2738]
    +         2848 uv_cond_wait  (in node) + 9  [0x10171d449]
    +           2848 _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]
    +             2848 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff20496cde]
    2848 Thread_118355838
    + 2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
    +   2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
    +     2848 node::inspector::(anonymous namespace)::StartIoThreadMain(void*)  (in node) + 19  [0x100e10de3]
    +       2848 uv_sem_wait  (in node) + 16  [0x10171da50]
    +         2848 semaphore_wait_trap  (in libsystem_kernel.dylib) + 10  [0x7fff204942f6]
    2848 Thread_118355840
      2848 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
        2848 _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
          2848 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, ivm::thread_pool_t::new_thread(std::__1::lock_guard<std::__1::mutex>&)::$_1> >(void*)  (in isolated_vm.node) + 164  [0x10d9ff544]
            2848 ivm::IsolatedScheduler::SendWake()::$_2::__invoke(bool, void*)  (in isolated_vm.node) + 49  [0x10d9f5921]
              2848 ivm::IsolateEnvironment::AsyncEntry()  (in isolated_vm.node) + 2405  [0x10d9e8fa5]
                2848 ivm::ThreePhaseTask::Phase2Runner::Run()  (in isolated_vm.node) + 125  [0x10d9f8d3d]
                  2848 ivm::EvalRunner::Phase2()  (in isolated_vm.node) + 173  [0x10da081ad]
                    2848 v8::Local<v8::Value> ivm::RunWithTimeout<ivm::EvalRunner::Phase2()::'lambda0'()>(unsigned int, ivm::EvalRunner::Phase2()::'lambda0'()&&)  (in isolated_vm.node) + 427  [0x10da0945b]
                      2848 v8::Script::Run(v8::Local<v8::Context>)  (in node) + 645  [0x100eba8a5]
                        2848 v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*)  (in node) + 213  [0x100feeb95]
                          2848 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&)  (in node) + 2515  [0x100fef583]
                            2848 Builtins_JSEntry  (in node) + 131  [0x10172c4c3]
                              2848 Builtins_JSEntryTrampoline  (in node) + 91  [0x10172c73b]
                                2848 Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
                                  2848 Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_BuiltinExit  (in node) + 57  [0x10179afb9]
                                    2848 v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*)  (in node) + 255  [0x100f19f8f]
                                      2848 v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments)  (in node) + 550  [0x100f1a836]
                                        2848 v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo)  (in node) + 462  [0x100f1b13e]
                                          2848 void ivm::detail::RunBarrier<ivm::detail::CallbackMaker<v8::Local<v8::Value> (*)(ivm::ReferenceHandle&, v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>), &(v8::Local<v8::Value> ivm::detail::unbind_member_function<v8::Local<v8::Value> (ivm::ReferenceHandle::*)(v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>)>::invoke<&(v8::Local<v8::Value> ivm::ReferenceHandle::Apply<0>(v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>))>(ivm::ReferenceHandle&, v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>)), -1, v8::FunctionCallbackInfo<v8::Value> const&>::Callback(v8::FunctionCallbackInfo<v8::Value> const&)::'lambda'()>(0)  (in isolated_vm.node) + 27  [0x10da43ceb]
                                            2848 void ivm::detail::CallbackMaker<v8::Local<v8::Value> (*)(ivm::ReferenceHandle&, v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>), &(v8::Local<v8::Value> ivm::detail::unbind_member_function<v8::Local<v8::Value> (ivm::ReferenceHandle::*)(v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>)>::invoke<&(v8::Local<v8::Value> ivm::ReferenceHandle::Apply<0>(v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>))>(ivm::ReferenceHandle&, v8::MaybeLocal<v8::Value>, v8::Maybe<ivm::ArrayRange>, v8::MaybeLocal<v8::Object>)), -1, v8::FunctionCallbackInfo<v8::Value> const&>::Spread<0ul, 1ul, 2ul, 3ul>(v8::FunctionCallbackInfo<v8::Value> const&, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul>)::'lambda'()::operator()() const  (in isolated_vm.node) + 524  [0x10da43f7c]
                                              2848 ivm::ThreePhaseTask::RunSync(ivm::IsolateHolder&, bool)  (in isolated_vm.node) + 494  [0x10d9f9b3e]
                                                2848 ivm::Scheduler::AsyncWait::Wait()  (in isolated_vm.node) + 78  [0x10d9f564e]
                                                  2848 std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)  (in libc++.1.dylib) + 18  [0x7fff20432d72]
                                                    2848 _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]
                                                      2848 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff20496cde]

Total number in stack (recursive counted multiple, when >=5):
        8       Builtins_InterpreterEntryTrampoline  (in node) + 202  [0x10172e52a]
        7       _pthread_start  (in libsystem_pthread.dylib) + 224  [0x7fff204c98fc]
        7       thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff204c5443]
        5       __psynch_cvwait  (in libsystem_kernel.dylib) + 0  [0x7fff20496cd4]
        5       _pthread_cond_wait  (in libsystem_pthread.dylib) + 1298  [0x7fff204c9e49]

Sort by top of stack, same collapsed (when >= 5):
        __psynch_cvwait  (in libsystem_kernel.dylib)        14240
        __psynch_mutexwait  (in libsystem_kernel.dylib)        2848
        kevent  (in libsystem_kernel.dylib)        2848
        semaphore_wait_trap  (in libsystem_kernel.dylib)        2848

Binary Images:
       0x100c64000 -        0x1044847af +node (0) <F4C5F2BC-ACCE-3125-90F8-2BA377D87BBD> /Users/*/node
       0x10d9de000 -        0x10da69ff7 +isolated_vm.node (0) <C0938873-7E34-319D-AF43-A62488BA1B74> /Users/*/isolated_vm.node
       0x10f10d000 -        0x10f1a768f  dyld (852.2) <0CC19410-FD43-39AE-A32A-50273F8303A4> /usr/lib/dyld
    0x7fff20201000 -     0x7fff20202e7f  libsystem_blocks.dylib (79) <925E3B6D-184D-3E73-97B1-643C4ADB387A> /usr/lib/system/libsystem_blocks.dylib
    0x7fff20203000 -     0x7fff20238bcf  libxpc.dylib (2038.120.1) <FFFB49D7-2CA6-3E1F-AE4E-5697B19B7D76> /usr/lib/system/libxpc.dylib
    0x7fff20239000 -     0x7fff20250b8f  libsystem_trace.dylib (1277.120.1) <7E800ECA-DFDB-3737-A3C5-FFDE37E65383> /usr/lib/system/libsystem_trace.dylib
    0x7fff20251000 -     0x7fff202eefdf  libcorecrypto.dylib (1000.140.4) <D211160D-E22F-3440-8054-1F5824519C7F> /usr/lib/system/libcorecrypto.dylib
    0x7fff202ef000 -     0x7fff2031bff7  libsystem_malloc.dylib (317.140.5) <050E37E1-1458-3F80-BFA3-F1488570169D> /usr/lib/system/libsystem_malloc.dylib
    0x7fff2031c000 -     0x7fff2036080f  libdispatch.dylib (1271.120.2) <8144B0BD-90D2-3EAE-999F-AB0D14082088> /usr/lib/system/libdispatch.dylib
    0x7fff20361000 -     0x7fff2039aad7  libobjc.A.dylib (824) <8C7C49A1-4211-3E4C-BA3D-160D675EEE96> /usr/lib/libobjc.A.dylib
    0x7fff2039b000 -     0x7fff2039dff7  libsystem_featureflags.dylib (28.60.1) <E5C43AE3-19E7-3DAB-8B5D-D79A4B68B5C0> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff2039e000 -     0x7fff20426ff7  libsystem_c.dylib (1439.141.1) <3C273899-4CBE-32D5-BB31-7A449743204F> /usr/lib/system/libsystem_c.dylib
    0x7fff20427000 -     0x7fff2047cff7  libc++.1.dylib (905.6) <FD6DB1CB-B14B-3404-8BEB-B459C2F6C303> /usr/lib/libc++.1.dylib
    0x7fff2047d000 -     0x7fff20492ff7  libc++abi.dylib (905.6) <D0CDDF98-1C04-300F-B685-4A4C59C04C42> /usr/lib/libc++abi.dylib
    0x7fff20493000 -     0x7fff204c2fff  libsystem_kernel.dylib (7195.141.6) <78289AAE-61B5-339F-A485-8819BC2388F2> /usr/lib/system/libsystem_kernel.dylib
    0x7fff204c3000 -     0x7fff204cefff  libsystem_pthread.dylib (454.120.2) <1268FF2D-A513-3B51-BA65-AF2FF5789DDB> /usr/lib/system/libsystem_pthread.dylib
    0x7fff204cf000 -     0x7fff2050aff7  libdyld.dylib (852.2) <3DE0178A-0AEE-3D08-AE19-6C6403F69BA1> /usr/lib/system/libdyld.dylib
    0x7fff2050b000 -     0x7fff20514fef  libsystem_platform.dylib (254.80.2) <EF52D569-09F5-32E1-B1B3-34E2CA55A017> /usr/lib/system/libsystem_platform.dylib
    0x7fff20515000 -     0x7fff20540fff  libsystem_info.dylib (542.40.3) <55B39B7F-957B-3D99-A8DF-7CA80D38155D> /usr/lib/system/libsystem_info.dylib
    0x7fff20541000 -     0x7fff209de3df  com.apple.CoreFoundation (6.9 - 1778.101) <8CF9D741-ADFF-3D5E-ACDE-DC342701EE0D> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
    0x7fff226b0000 -     0x7fff2290fff7  libicucore.A.dylib (66112) <AC994BC1-F9CC-359C-A7B5-F2821EAEF650> /usr/lib/libicucore.A.dylib
    0x7fff22910000 -     0x7fff22919fff  libsystem_darwin.dylib (1439.141.1) <2C81A009-45BB-30D7-A4F7-4B2EEC691617> /usr/lib/system/libsystem_darwin.dylib
    0x7fff22d2f000 -     0x7fff22d3aff3  libsystem_notify.dylib (279.40.4) <2E40EA4A-B124-3010-8379-1B4D7082A08F> /usr/lib/system/libsystem_notify.dylib
    0x7fff24cc7000 -     0x7fff24cd5ff7  libsystem_networkextension.dylib (1295.140.3) <83AA4425-2F1D-36EC-B77B-8D4F03CDDB68> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff24d34000 -     0x7fff24d4affb  libsystem_asl.dylib (385) <8D324D65-EE16-3A1A-BD39-ACB1B3050D1F> /usr/lib/system/libsystem_asl.dylib
    0x7fff26411000 -     0x7fff26418ffb  libsystem_symptoms.dylib (1431.140.1) <1B4D8837-C951-3B69-B079-85D477749E8B> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff28420000 -     0x7fff28430ff3  libsystem_containermanager.dylib (318.100.4) <1139CD47-9CBA-356F-8694-1D00EB9F0C8F> /usr/lib/system/libsystem_containermanager.dylib
    0x7fff29134000 -     0x7fff29137ffb  libsystem_configuration.dylib (1109.140.1) <02F3A5C9-6289-3012-8F5F-F1DB669ADB79> /usr/lib/system/libsystem_configuration.dylib
    0x7fff29138000 -     0x7fff2913cfff  libsystem_sandbox.dylib (1441.141.4) <5471601B-5072-3E97-8926-804FF08DC4C0> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff29e2e000 -     0x7fff29e30ff3  libquarantine.dylib (119.40.2) <3244B57B-9FDF-373E-9F96-A7BAD7534F23> /usr/lib/system/libquarantine.dylib
    0x7fff2a3d9000 -     0x7fff2a3ddfff  libsystem_coreservices.dylib (127.1) <619CCB6D-226C-35BD-98FB-04A18FD54792> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff2a5ed000 -     0x7fff2a634fff  libsystem_m.dylib (3186.100.3) <D61B56FE-649B-34A0-8446-25685B2BBBF2> /usr/lib/system/libsystem_m.dylib
    0x7fff2a636000 -     0x7fff2a63bfff  libmacho.dylib (980) <A4F4D532-7824-3E4E-8FB6-45617415E7DD> /usr/lib/system/libmacho.dylib
    0x7fff2a658000 -     0x7fff2a663fff  libcommonCrypto.dylib (60178.120.3) <CF1E0E70-9F6C-3FAF-82B2-D55F7C9EBB03> /usr/lib/system/libcommonCrypto.dylib
    0x7fff2a664000 -     0x7fff2a66eff7  libunwind.dylib (201) <4602E909-C71A-3006-8140-BE616DA241EE> /usr/lib/system/libunwind.dylib
    0x7fff2a66f000 -     0x7fff2a676fff  liboah.dylib (203.58) <F72C2D50-7279-3497-8A59-56908F9661F3> /usr/lib/liboah.dylib
    0x7fff2a677000 -     0x7fff2a681ff7  libcopyfile.dylib (173.40.2) <B0F35A80-D5E3-33DD-A47D-ACBFE1300523> /usr/lib/system/libcopyfile.dylib
    0x7fff2a682000 -     0x7fff2a689fff  libcompiler_rt.dylib (102.2) <1C049207-1719-39AC-A2A9-6E5BE28AA138> /usr/lib/system/libcompiler_rt.dylib
    0x7fff2a68a000 -     0x7fff2a68cff7  libsystem_collections.dylib (1439.141.1) <F2D775D9-AAEF-371F-AA54-CFB882B9B430> /usr/lib/system/libsystem_collections.dylib
    0x7fff2a68d000 -     0x7fff2a68ffff  libsystem_secinit.dylib (87.60.1) <EB4516ED-1F8B-3E8A-8C4B-B209A33DCCEF> /usr/lib/system/libsystem_secinit.dylib
    0x7fff2a690000 -     0x7fff2a692ff7  libremovefile.dylib (49.120.1) <1AEE3D84-32F9-35FB-8036-B178C9E27D20> /usr/lib/system/libremovefile.dylib
    0x7fff2a693000 -     0x7fff2a693ffb  libkeymgr.dylib (31) <698AF6EE-08BB-36CF-B7AD-9EC16E36FA0B> /usr/lib/system/libkeymgr.dylib
    0x7fff2a694000 -     0x7fff2a69bff3  libsystem_dnssd.dylib (1310.140.1) <0685BDB0-9A98-3ADD-B95A-11F221FD80D7> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff2a69c000 -     0x7fff2a6a1ff3  libcache.dylib (83) <B51FAB34-AA9C-38C5-95F1-E5E54B21EA67> /usr/lib/system/libcache.dylib
    0x7fff2a6a2000 -     0x7fff2a6a3ff7  libSystem.B.dylib (1292.120.1) <DBD0A184-CD98-3225-8E9B-D5BFE0D30562> /usr/lib/libSystem.B.dylib
    0x7fff2a6a4000 -     0x7fff2a6a7ff7  libfakelink.dylib (3) <BE0E6C60-675A-3739-A47A-67C650B1F790> /usr/lib/libfakelink.dylib
    0x7fff2a6a8000 -     0x7fff2a6a8ff7  com.apple.SoftLinking (1.0 - 1) <9E4B6591-74E3-3B36-91C4-851FAA567DAA> /System/Library/PrivateFrameworks/SoftLinking.framework/Versions/A/SoftLinking
    0x7fff2daa6000 -     0x7fff2daa6ff7  liblaunch.dylib (2038.120.1) <4A353070-A560-3A98-8869-28C92435C6B2> /usr/lib/system/liblaunch.dylib
    0x7fff2ff3d000 -     0x7fff2ff3dfff  libsystem_product_info_filter.dylib (8.40.1) <78928329-DD98-3799-989D-870DF92FE8D5> /usr/lib/system/libsystem_product_info_filter.dylib
Sample analysis of process 23338 written to file /dev/stdout

[marcusdarmstrong]

Further testing has caused me to realize I was entirely mistaken when thinking this was related to promises. In fact, it appears to be due to isolate disposal while there's a scheduled async task that interacts synchronously with the main isolate:

const ivm = require('isolated-vm');

setInterval(() => { console.log("Event Loop is running"); }, 100);

(async () => {
  const isolate = new ivm.Isolate();
  const context = isolate.createContextSync();
  context.global.setSync("getProm", () => {}, { reference: true });
  context.eval("getProm.applySync()"); // Awaiting here resolves the issue
  context.release();
  console.log(`Context for Isolate released`);
  isolate.dispose();
  console.log(`Isolate disposed`);
})();

[laverdet]

Thanks for the short test case. The fix for this is out on npm.